Phil, have you any 'independent' comments on the
PIR???
<<Other than a quick play this
afternoon in the bathroom then no … I had it set up in the ceiling in
the
centre of the room which is about 6ft x 7ft and it seemed to reliably trip
each
time I turned a page on the CPC catalogue which I was reading in the bath.
It
also tripped fairly frequently even when I wasn’t turning pages but I
think it can be “fooled” easily enough by sitting *VERY* still … not as easily
though as
a standard alarm PIR!
I want to get the lights finished
tomorrow
and then I’ll mount it in the landing ceiling which will be a better
test
as I want to get it turning the landing light on and off at night …
something which will test it’s detection at longer
distances!>>
These PIRs are excellent,
however they're not the total answer to the 'holy grail' of true occupancy
detection. They will tell you if a room is occupied with (slightly)
active person/people but I'm not sure if they would trigger if you fell
asleep
on the sofa watching TV - I think I'd be scared if I woke up cold and in
the
dark! :o)
<<In many ways this is a good
thing ...
My main need is more movement than occupancy anyway. If you fall asleep and
the
lights go out then not a problem … as soon as you wake up and move
they’ll
come on again! Heating going off is a more serious problem of course!>>
They're probably as good as we're going to get as far as
reliability/cost in the near future.
<<Definitely a step forward from
alarm PIRs … but obviously can’t be
used
for alarms as they’re too liable to false trip.>>